TestFlight version is still processing for 5days

At App Store Connect, I have published my app, v2.0.0(17). Last 4 days ago, I released V2.0.1(18) to TestFlight and it is still processing. I need to increase the version number because the client wants to show app update dialog to upgrade the new version. So today I released a new one V2.0.1(19) to TestFlight again but Apple replied with the following email. I just released 2.0.1(19) but why they mention (20) and does not say anything about issues. Dear Developer,

We identified one or more issues with a recent delivery 
for your app,  
"ProjectName" 2.0.1 (20). Please correct the following 
issues, then upload again.  
Best regards,

The App Store Team

Today I got reply from app store. May I know how to do app thinning and how to upload again to TestFlight again?

Your build number 18 and 20 are not eligible for TestFlight due to no app thinning variant found. Please take a look at the following guideline, and resubmit with higher build number:

http://help.apple.com/xcode/mac/9.0/#/devbbdc5ce4f
TestFlight version is still processing for 5days
 
 
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